Valve mechanism for pumps.



J. DICK, T. H. BUTTE-R & C. E. LEWiS.

VALVE MECHANISM FOR PUMPS.

APPLICATION FILED DEC.2,1916- Patented J 11116 26, 191K m mw 7 m- 8 Z 33 6 Z 2 5 v 21527 5 44 3 2 3 may 7 WITNESSES JOHN DICK, OF EASTPITTSBURGH,

THOMAS H. BUTTER, 0F HOMESTEAD, AND CHARLES E. LEWIS, OF SVJISSVALE,PENNSYLVANIA.

vanvn MECHANISM son PUMPS.

memos.

To all whom it may concern:

H. BUTTER, and CHARLES E. Lew s, citizens of the United States, andresidents, respectively of East Pittsburgh, Homestead, and

Swissvale, all in the county of Allegheny and State of Pennsylvania,have invented certain new and useful Improvements in Valve Mechanismsfor Pumps, of which the following is a specification.

Our invention relates to the construction of-va-lve mechanisms forpumps, is adapted for use on both the suction and discharge sides of thepumps-and although not limited to such apparatus,- isprimarily intendedfor use with high pressure pumps employed in pumping water and otherfluids at high or more than average pressures.

l 'Heretofore, so far as we are aware, it has been the practice toinclose the valve mechanism of such pumps within the valve cas-' ing sothat the operation of the valves is not visible when the pump is in use,and it is necessary to stop the operation of the pump and uncover thevalve mechanism in order to ad ust the valve mechanism, as be comesnecessary from time to time in the operation of such pumps and todetermine whether or not the valve and its seat are in working order andthe valve is closing tightly on its seat.

One object of our invention is to provide a valve mechanism for pumpshaving novel means for controlling the opening and. closing movements ofthe 'alves, and for adjusting the valve mechanism in positioning andregulating the extent of lifting movement of the valve.

Another object of the invention is to provide a "alve mechanism havingimproved means whereby theextent of lifting movement of the valve ismade visible andpadjustment of the valve and valve operating mechanismis made possible without interruption of-the operation of the pump.

A further objectof this invention is to provide a valve mechanism forpumps having novel means whereby the extent of lift- I movement of thevalve is lessened or inf ing movement of the valve in opening is variedwithout change in the force oppos ing the lifting movement of the valve,and I whereby the force opposing the lifting Specification of LettersPatent.

by bolts 7 and nuts 8. The casing 2 Patented June 2%, 1911 it,

Application filed December 2, 1916. Serial No. 134,710.

, creased at will without variation in the e1;- Be it known that we,JoHN DIeK,TnoMAs tent of lifting movement.

A further object of the invention is to provide a valve mechanism forpumps havmg mproved means whereby the friction between the sliding partsof the valve mechanism is reduced and. leakage at the joints betweenrelatively moving parts of the apparatus is avoided and overcome.

Still further objects of our invention consist in the provision of thenovel construe tions, combinations, and arrangements of parts shown inthe drawing, to be described in detail hereinafter, and to beparticularly pointed out in the appended claims.

The drawing forming part of this specification is a sectional elevationshowing a pump casing having a valve mechanism constructed and arrangedand applied for use thereon in accordance with our invention, theconstruction shown being adapted for use-on either the inlet or suctionsiee,-or the outlet or discharge side of the pump.

In the accompanying drawing, the numeral 2 designates the body or casingof a pump valvechamber having openings 3 and a connected to one end andadjacent to the opposite end of a transverse opening 5 which forms thevalve chamber. One end of the opening forming the chamber extends to theexterior of the casing and is closed by means of a removable flange orcap 6 which is detachably secured in place may be located on either thesuction side or discharge-side of the pumpgso that the opening 3 willform either the valve chamber inlet to, or outlet from the valve chamber5, depending upon the side of the pump on which the chamber 5 ispositioned.

The chamber of,the casing 2, which is shown located on the suction orinlet side of the pump, is provided at one end with a removable annularseat 9, and positioned on the seat 9 is'a lifting valve 10 of themushroom. type. The valve 10 has, on its lower face, a spider 11 whichprojects downwardly intothe opening in the annular seat and forms aguide to maintain the valve in axial alinement with its scat during theopening and closing movements of the valve. The valve 10 also has abeveled face 10 on itsiperipherv which engages with a si1niried inadjusting the seating position of the valve with respect to the casing.2, as'becomes necessary when the seat 9 and valve 10, after extendeduse,are ground or faced.

The head of the cap screw 13 has a conical recess therein which isengaged by the conical end of the valve needle 14', this needle forminga neat sliding fit with and extending through the axial opening in theadjusting stem 15 to form means for connecting the valve 10 which isinclosed within the valve chamber 5,to the valve spring 16 on theexterior of the valve chamber. A counterbore 17 in the lower end of thestem 15 provides clearance for the head of the cap screw 13, to enablethe valve stem 12 to engage with the end of the adjusting stem 15. I

The flange or cap 6 has an annular projection 18 on one face, whichprojects into the valve chamber 5, and the opposite face of this flangehas a counter-bored axial open ing 19 therein, the counterbore 20 ofthis axial opening being provided with internal screw threads andforming a stuiiing box for the adjusting stem 15 which extends throughthe axial opening 19 and counterbore 20.

The stutling box formed by the counterbore 20 is provided with aremovable seat 21 and with a packing nut or gland 22,

which is polygonal in transverse section at its upper end for theattachment of a wrench. The gland 22 is screwed into the stufiing boxand engages with the annular ring 23 to compress the packing in forminga tight joint around the adjusting stem 15. The gland 22 also has aninternally threaded recess 24 in one end, the threads of which engagewith the screw threads 25 the stem 15.

on the adjusting stem 15 to hold this stem in ad usted position on theflange 6. A am nut 26 on the stem 15, winch engages with the end of thegland 22, locks this stem in adjusted position. v

The outer end of the adjusting stem 15 also is screw threaded and has ashoulder 2'2 thereon against which the internally threaded end of thehollow spring post 28 is jammed in' fastening the post on the adjustingscrew, the shoulder 27 being made polygonal in transverse section toafford means for applying a wrench in adjusting The spring post 28 has aset screw 2) in its opposite end for securing the valve spring 16, whichis located within the hollow post, in place, and for adjusting thecompression on the spring. The jam nut 30, by engagement with the end ofthe post 28, locks the set screw 29 in adjusted position.

The openings 31 in the side wall of the the packing in the stutling boxand form a tight joint around the lengthwise movable needle. The needle14 is made small in diameter so as to lessen the friction between it andthe-packing in the stutfing box 32, and as the major portion of thelength of the needle forms a neat .sliding fit within the openings inthe gland 33 and adjusting stem 15, the needle cannot bend and'bind whentransmitting power or force from the spring 16 to the valve 10, or viceversa.

A spring centering cap or follower 35 is positioned between the outerend of the needle 14 and one end of the spring 16, and a similarfollower 36 connects the other end of the spring with the conical end ofthe set screw 29 in the outer end of the spring post 28, the valvespring 16 being held in position within the hollow spring post 28 byengagement with the projections 37 and 38 on the faces of the followers35 and 36.

By reference to the drawing it will be readily seen that the operationof the valve 10 within the valve chamber 5 is indicated or made visibleby the movement of the outer end of the needle lei, and the spring 16,which are on the exterior of the valve chamber 5.

It will also be seen thgt the valve 10 may be positioned within thevalve chamber 5 invarious locations to suit the seat when the valve andseat are re-ground or re-faced, without changing the amount ofcompression on the valve spring 16, by suitably adjusting the cap screw13 in the end of the stem 12 of the valve. The extent of liftingmovement of the valve 10 is regulated by means of the adjusting stem 15,as the end of the valve stem 12 engages with the ad jacent end of theadjusting stem 15 so that by: varying the position of the adjusting stem15 in the casing 2 relative to the valve 10 the lifting movement of thevalve may be changed. hen the lifting movement of the valve 10 ischanged the compression of the spring 16 will be regulated by means ofthe set screw 29 in the upper endof the opening therein, an adjustingstem mounted in theaxial opening and having an axial opening therein, ahollow spring post on the outer end of said stem, a coil spring withinthe hollow post, and a sliding needle extending through the axialopening in said stem and operatively connecting said spring and liftingvalve.

2. A valve mechanism comprising a valve casing -having a valve chamber,a lifting valve in the chamber, said chamber having .inlet and outletopenings extending thereinto, said openings being on opposite sides ofsaid valve, a cap closing one end of the valve chamber and having anaxial opening. therein, an adjusting stem mounted in the axial openingand having an'axial opening therein, means for adjusting the stem onsaid cap, a hollow spring post on the outer end of said stem, a coilspring within the post, and a slidingjneedle extending through the axialopening in said stem and operatively connecting said spring and liftingvalve.

3.. A valve mechanism comprising a valve casing having a valve chamber,a lifting valve in said chamber, an adjusting screw on said valve toregulate the lifting movement of the valve relative to the adjustingstem, said chamber having inlet and outlet openings extending thereinto,said openings be ing on opposite sides of said valve, a removable capclosing one end of the valve chamber and having an axial openingtherein, an adjusting stem mounted in the axial opening and having anaxial opening therein, a hollow spring post on the outer end of saidstem, a coil spring within the hollow post, and a sliding needleextending through the axial opening in said stem and operatively'connecting said spring and lifting valve.

4. A valve mechanism comprising a valve casing having a valve chamber, alifting valve in said chamber, said chamber having inlet and outletopenings extendingthereinto, said openings being on opposite sides ofsaid valve, a removable cap closing one end of the valve chamber andhaving an axialopening therein, an adjusting stem mounted in the axialopeningand having an axial opening therein, means for adjusting the stemon said cap, means for locking the stem in adjusted position, a hol lowspring post on the outer end of said stem, a spring within the hollowpost,'and a sliding needle extending through the axial opening in saidstem and operatively connectmg said spring and lifting valve.

, 5. A valve mechanism comprising a valve casing havmg a valve chamber,a lifting valve in the chamber, said chamber hav-- ing inlet and outletopenings extending thereinto, said openings being on opposite sides ofsaid valve, a cap closing one end of the valve chamber and having anaxial opening therein, an adjusting stem mounted in the axial openingand having an axial opening therein, a hollow spring post on the outerend-of said stem, a coil spring within the hollow post, a sliding needleextending through the axial opening in said stem to connect the springand valve, and adjusting means on the spring post to engage the springin regulating the compression on said spring.

' 6. A valve mechanism comprising a valve casing having a valve chamber,a lifting valve in said chamber, said chamber having inlet and outletopenings extending thereinto, said openings being. on opposite sides of,the valve, a cap closing one end of the valve chamber and having anaxial open ing therein, an adjusting stem mounted in the axial openingand having an axial opening therein, means;- for packing the jointbetween said cap and adjusting stem,

a spring post on the outer end of said stem,

.a spring on the post, a sliding needle'extending through the axialopening in said stem and connecting said valve with the spring, andmeans for packing the joint between said stem and needle.

7. A valve mechanism comprising a valve casing having a valve chamber, alifting valve in the chamber, said chamber having inlet and outletopenings extending there into, said openings being on opposite sides ofsaid valve, a cap closing one end of the valve chamber, an adjustingstem adjustably mounted on the cap, said stem having an axial openingtherein, a spring post on the outer end of said stem, :1 spring on thepost, and a slidable needle extending through the opening in said stemto connect said liftingvalve with said spring.

In testimony whereof we have hereunto set our hands.

JOHN DICK. THOMAS H. BUTTER. CHARLES E. LEWVIS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latenta Washington, D. 0.

